REFINERY TECHNOLOGIES

ExoS™ Sulfur Extraction

Technology

A KOCH ENGINEERED SOLUTIONS COMPANY

How It Works

ExoS segregates olefin-rich

material from the FCC naphtha

hydrotreater feed and sends it to a proprietary

solvent-based extraction process. This process

utilizes a proprietary solvent blend and customized

fixed-tower internals to maximize extraction efficiency

of sulfur species from the high-vapor pressure mid-

cut naphtha, generating an olefin-rich raffinate that

meets the Tier III sulfur

mandate. The raffinate

stream can be sent directly

to the blending pool, and

a sulfur-rich, olefin-lean

extract that can be sent on

to the naphtha hydrotreater,

dramatically decreasing

olefin saturation and

minimizing octane loss.

Benefits

• Reduced total FCC naphtha pool octane loss of <1 vs 2-4+ for conventional hydrotreating

• Decreased hydrotreater feed flow by up to 40% and H2 consumption by up to 50%

• Reduced size, CAPEX and OPEX of the hydrotreater

• Elimination or reduction of light FCC naphtha treatment (unit can accept C5s also)

• Ability to use the low-sulfur, olefin-rich raffinate stream directly in the gasoline blending pool or as feed to other processes

• Reduced energy consumption compared to the competitors’ extractive distillation process due to our multi-step liquid/liquid extraction and distillation process

• Exclusive sulfur extraction technology for mid-cut FCC naphtha

• Proven in multiple successful field installations

• No specialized equipment or hydrogen required

• Generates an olefin-rich C6-C7 raffinate with less than 10 ppm Sulfur that bypasses the hydrotreater

• Can be installed with a new hydrotreater to reduce the size, CAPEX and OPEX of the hydrotreater

• Can be installed as a revamp to save octane and free up hydrotreater capacity

Minimize Octane Loss In FCC Naptha HydrotreatingRefiners meeting the 10 ppmw total sulfur limit in their gasoline blending pool

are finding olefin saturation and octane destruction an expensive byproduct of

the process. Our exclusive ExoS technology solves the problem. Generating

an olefin-rich C6-C7 raffinate with less than 10 ppm Sulfur that bypasses

the hydrotreater, ExoS is the environmentally friendly, low-waste generating

method for meeting clean-fuel sulfur limits.

REFINERY TECHNOLOGIES

ExoS, At-A-Glance

Pre-

Hyd

rotr

eatin

g(O

ptio

nal)

Ligh

t Ole

finRe

cove

ry

Frac

tiona

tion

Extr

actio

nH

ydro

trea

ting

Low Sulfur C5 Light Cut

Low Sulfur – Olefin Rich Mid Cut

(~90% of MCN Feed)

ExoS™ Technology

Light Olefin

Sulfur Rich Extract

(~10% of MCN Feed)

Low S Heavy Cut

Mid Cut

Heavy Cut

(C6~7）FCC

Full Range Naphtha

Blending Pool

Mid-Cut Naphtha(MCN)

Desulfurized / Olefin RichMCN to Blending

InfrequentResidue

Discharge

Sulfur Rich Extractto Hydrotreater

De-

Oil

Col

umn

Extr

actio

n C

olum

n

Wat

er S

crub

ber

Solv

ent P

urifi

catio

nC

olum

n

Ole

fins

Reco

very

Col

umn

Olefins RefluxDrum

De-Oil ColumnReflux Drum

EXOS PROCESS FLOW

DIAGRAM

EXOS INTEGRATION with Your Refinery

About Koch Technology Solutions (KTS)

KTS collaborates with industry leaders to license innovative technologies for refinery

optimization and natural gas liquids processing. Leveraging the expertise of Koch

Engineered Solutions companies such as Koch-Glitsch, Koch Projects Solutions, Optimized

Process Designs and others, we offer our licensees project execution options ranging

from Process Design Packages and Services to LSTK.

For more information, visit kochtechsolutions.com.

kochtechsolutions.com

A KOCH ENGINEERED SOLUTIONS COMPANY